A medical worker guides residents to line up at a COVID-19 testing site in Tongren City, southwest China's Guizhou Province, Dec. 29, 2021. (Photo by Ye Shunqiang/Xinhua)
People line up for COVID-19 tests at a COVID-19 testing site in Tongren City, southwest China's Guizhou Province, Dec. 29, 2021. (Photo by Peng Jun/Xinhua)
A medical worker collects a swab sample from a resident at a COVID-19 testing site in Tongren City, southwest China's Guizhou Province, Dec. 29, 2021. (Photo by Ye Shunqiang/Xinhua)
A medical worker collects a swab sample from a resident at a COVID-19 testing site in Tongren City, southwest China's Guizhou Province, Dec. 29, 2021. (Photo by Peng Jun/Xinhua)
